@@ -105,23 +105,6 @@ send_skb_err:
return NET_XMIT_DROP;
}
-/* sends a raw packet. */
-void send_raw_packet(unsigned char *pack_buff, int pack_buff_len,
- struct batman_if *batman_if, uint8_t *dst_addr)
-{
- struct sk_buff *skb;
- char *data;
-
- skb = dev_alloc_skb(pack_buff_len + sizeof(struct ethhdr));
- if (!skb)
- return;
- data = skb_put(skb, pack_buff_len + sizeof(struct ethhdr));
- memcpy(data + sizeof(struct ethhdr), pack_buff, pack_buff_len);
- /* pull back to the batman "network header" */
- skb_pull(skb, sizeof(struct ethhdr));
- send_skb_packet(skb, batman_if, dst_addr);
-}
-
/* Send a packet to a given interface */
static void send_packet_to_if(struct forw_packet *forw_packet,
struct batman_if *batman_if)
@@ -27,8 +27,6 @@
int send_skb_packet(struct sk_buff *skb,
struct batman_if *batman_if,
uint8_t *dst_addr);
-void send_raw_packet(unsigned char *pack_buff, int pack_buff_len,
- struct batman_if *batman_if, uint8_t *dst_addr);
void schedule_own_packet(struct batman_if *batman_if);
void schedule_forward_packet(struct orig_node *orig_node,
struct ethhdr *ethhdr,
@@ -44,6 +44,8 @@
_dummy > smallest_signed_int(_dummy); })
#define seq_after(x, y) seq_before(y, x)
+#define MAX_VIS_PACKET_SIZE 1000
+
static struct hashtable_t *vis_hash;
static DEFINE_SPINLOCK(vis_hash_lock);
static DEFINE_SPINLOCK(recv_list_lock);
@@ -66,6 +68,7 @@ static void free_info(struct kref *ref)
kfree(entry);
}
spin_unlock_irqrestore(&recv_list_lock, flags);
+ kfree_skb(info->skb_packet);
kfree(info);
}
@@ -73,9 +76,12 @@ static void free_info(struct kref *ref)
static int vis_info_cmp(void *data1, void *data2)
{
struct vis_info *d1, *d2;
+ struct vis_packet *p1, *p2;
d1 = data1;
d2 = data2;
- return compare_orig(d1->packet.vis_orig, d2->packet.vis_orig);
+ p1 = (struct vis_packet *)d1->skb_packet->data;
+ p2 = (struct vis_packet *)d2->skb_packet->data;
+ return compare_orig(p1->vis_orig, p2->vis_orig);
}
/* hash function to choose an entry in a hash table of given size */
@@ -83,11 +89,13 @@ static int vis_info_cmp(void *data1, void *data2)
static int vis_info_choose(void *data, int size)
{
struct vis_info *vis_info = data;
+ struct vis_packet *packet;
unsigned char *key;
uint32_t hash = 0;
size_t i;
- key = vis_info->packet.vis_orig;
+ packet = (struct vis_packet *)vis_info->skb_packet->data;
+ key = packet->vis_orig;
for (i = 0; i < ETH_ALEN; i++) {
hash += key[i];
hash += (hash << 10);
@@ -180,6 +188,7 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
HASHIT(hashit);
HASHIT(hashit_count);
struct vis_info *info;
+ struct vis_packet *packet;
struct vis_info_entry *entries;
struct net_device *net_dev = (struct net_device *)seq->private;
struct bat_priv *bat_priv = netdev_priv(net_dev);
@@ -202,22 +211,22 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
spin_lock_irqsave(&vis_hash_lock, flags);
while (hash_iterate(vis_hash, &hashit_count)) {
info = hashit_count.bucket->data;
+ packet = (struct vis_packet *)info->skb_packet->data;
entries = (struct vis_info_entry *)
- ((char *)info + sizeof(struct vis_info));
+ ((char *)packet + sizeof(struct vis_packet));
- for (i = 0; i < info->packet.entries; i++) {
+ for (i = 0; i < packet->entries; i++) {
if (entries[i].quality == 0)
continue;
vis_data_insert_interface(entries[i].src, &vis_if_list,
- compare_orig(entries[i].src,
- info->packet.vis_orig));
+ compare_orig(entries[i].src, packet->vis_orig));
}
hlist_for_each_entry(entry, pos, &vis_if_list, list) {
- buf_size += 18 + 26 * info->packet.entries;
+ buf_size += 18 + 26 * packet->entries;
/* add primary/secondary records */
- if (compare_orig(entry->addr, info->packet.vis_orig))
+ if (compare_orig(entry->addr, packet->vis_orig))
buf_size +=
vis_data_count_prim_sec(&vis_if_list);
@@ -240,15 +249,15 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
while (hash_iterate(vis_hash, &hashit)) {
info = hashit.bucket->data;
+ packet = (struct vis_packet *)info->skb_packet->data;
entries = (struct vis_info_entry *)
- ((char *)info + sizeof(struct vis_info));
+ ((char *)packet + sizeof(struct vis_packet));
- for (i = 0; i < info->packet.entries; i++) {
+ for (i = 0; i < packet->entries; i++) {
if (entries[i].quality == 0)
continue;
vis_data_insert_interface(entries[i].src, &vis_if_list,
- compare_orig(entries[i].src,
- info->packet.vis_orig));
+ compare_orig(entries[i].src, packet->vis_orig));
}
hlist_for_each_entry(entry, pos, &vis_if_list, list) {
@@ -256,14 +265,14 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
buff_pos += sprintf(buff + buff_pos, "%s,",
tmp_addr_str);
- for (i = 0; i < info->packet.entries; i++)
+ for (i = 0; i < packet->entries; i++)
buff_pos += vis_data_read_entry(buff + buff_pos,
&entries[i],
entry->addr,
entry->primary);
/* add primary/secondary records */
- if (compare_orig(entry->addr, info->packet.vis_orig))
+ if (compare_orig(entry->addr, packet->vis_orig))
buff_pos +=
vis_data_read_prim_sec(buff + buff_pos,
&vis_if_list);
@@ -346,7 +355,9 @@ static struct vis_info *add_packet(struct vis_packet *vis_packet,
int make_broadcast)
{
struct vis_info *info, *old_info;
+ struct vis_packet *search_packet, *old_packet;
struct vis_info search_elem;
+ struct vis_packet *packet;
*is_new = 0;
/* sanity check */
@@ -354,13 +365,21 @@ static struct vis_info *add_packet(struct vis_packet *vis_packet,
return NULL;
/* see if the packet is already in vis_hash */
- memcpy(search_elem.packet.vis_orig, vis_packet->vis_orig, ETH_ALEN);
+ search_elem.skb_packet = dev_alloc_skb(sizeof(struct vis_packet));
+ if (!search_elem.skb_packet)
+ return NULL;
+ search_packet = (struct vis_packet *)skb_put(search_elem.skb_packet,
+ sizeof(struct vis_packet));
+
+ memcpy(search_packet->vis_orig, vis_packet->vis_orig, ETH_ALEN);
old_info = hash_find(vis_hash, &search_elem);
+ kfree_skb(search_elem.skb_packet);
if (old_info != NULL) {
+ old_packet = (struct vis_packet *)old_info->skb_packet->data;
if (!seq_after(ntohl(vis_packet->seqno),
- ntohl(old_info->packet.seqno))) {
- if (old_info->packet.seqno == vis_packet->seqno) {
+ ntohl(old_packet->seqno))) {
+ if (old_packet->seqno == vis_packet->seqno) {
recv_list_add(&old_info->recv_list,
vis_packet->sender_orig);
return old_info;
@@ -375,30 +394,39 @@ static struct vis_info *add_packet(struct vis_packet *vis_packet,
kref_put(&old_info->refcount, free_info);
}
- info = kmalloc(sizeof(struct vis_info) + vis_info_len, GFP_ATOMIC);
+ info = kmalloc(sizeof(struct vis_info), GFP_ATOMIC);
if (info == NULL)
return NULL;
+ info->skb_packet = dev_alloc_skb(sizeof(struct vis_packet) +
+ vis_info_len + sizeof(struct ethhdr));
+ if (!info->skb_packet) {
+ kfree(info);
+ return NULL;
+ }
+ skb_reserve(info->skb_packet, sizeof(struct ethhdr));
+ packet = (struct vis_packet *)skb_put(info->skb_packet,
+ sizeof(struct vis_packet) +
+ vis_info_len);
+
kref_init(&info->refcount);
INIT_LIST_HEAD(&info->send_list);
INIT_LIST_HEAD(&info->recv_list);
info->first_seen = jiffies;
- memcpy(&info->packet, vis_packet,
- sizeof(struct vis_packet) + vis_info_len);
+ memcpy(packet, vis_packet, sizeof(struct vis_packet) + vis_info_len);
/* initialize and add new packet. */
*is_new = 1;
/* Make it a broadcast packet, if required */
if (make_broadcast)
- memcpy(info->packet.target_orig, broadcast_addr, ETH_ALEN);
+ memcpy(packet->target_orig, broadcast_addr, ETH_ALEN);
/* repair if entries is longer than packet. */
- if (info->packet.entries * sizeof(struct vis_info_entry) > vis_info_len)
- info->packet.entries = vis_info_len /
- sizeof(struct vis_info_entry);
+ if (packet->entries * sizeof(struct vis_info_entry) > vis_info_len)
+ packet->entries = vis_info_len / sizeof(struct vis_info_entry);
- recv_list_add(&info->recv_list, info->packet.sender_orig);
+ recv_list_add(&info->recv_list, packet->sender_orig);
/* try to add it */
if (hash_add(vis_hash, info) < 0) {
@@ -441,6 +469,7 @@ void receive_client_update_packet(struct bat_priv *bat_priv,
int vis_info_len)
{
struct vis_info *info;
+ struct vis_packet *packet;
int is_new;
unsigned long flags;
int vis_server = atomic_read(&bat_priv->vis_mode);
@@ -457,20 +486,23 @@ void receive_client_update_packet(struct bat_priv *bat_priv,
spin_lock_irqsave(&vis_hash_lock, flags);
info = add_packet(vis_packet, vis_info_len, &is_new, are_target);
+
if (info == NULL)
goto end;
/* note that outdated packets will be dropped at this point. */
+ packet = (struct vis_packet *)info->skb_packet->data;
/* send only if we're the target server or ... */
if (are_target && is_new) {
- info->packet.vis_type = VIS_TYPE_SERVER_SYNC; /* upgrade! */
+ packet->vis_type = VIS_TYPE_SERVER_SYNC; /* upgrade! */
send_list_add(info);
/* ... we're not the recipient (and thus need to forward). */
- } else if (!is_my_mac(info->packet.target_orig)) {
+ } else if (!is_my_mac(packet->target_orig)) {
send_list_add(info);
}
+
end:
spin_unlock_irqrestore(&vis_hash_lock, flags);
}
@@ -483,8 +515,11 @@ static int find_best_vis_server(struct vis_info *info)
{
HASHIT(hashit);
struct orig_node *orig_node;
+ struct vis_packet *packet;
int best_tq = -1;
+ packet = (struct vis_packet *)info->skb_packet->data;
+
while (hash_iterate(orig_hash, &hashit)) {
orig_node = hashit.bucket->data;
if ((orig_node != NULL) &&
@@ -492,8 +527,7 @@ static int find_best_vis_server(struct vis_info *info)
(orig_node->flags & VIS_SERVER) &&
(orig_node->router->tq_avg > best_tq)) {
best_tq = orig_node->router->tq_avg;
- memcpy(info->packet.target_orig, orig_node->orig,
- ETH_ALEN);
+ memcpy(packet->target_orig, orig_node->orig, ETH_ALEN);
}
}
return best_tq;
@@ -502,8 +536,11 @@ static int find_best_vis_server(struct vis_info *info)
/* Return true if the vis packet is full. */
static bool vis_packet_full(struct vis_info *info)
{
- if (info->packet.entries + 1 >
- (1000 - sizeof(struct vis_info)) / sizeof(struct vis_info_entry))
+ struct vis_packet *packet;
+ packet = (struct vis_packet *)info->skb_packet->data;
+
+ if (MAX_VIS_PACKET_SIZE / sizeof(struct vis_info_entry)
+ < packet->entries + 1)
return true;
return false;
}
@@ -516,21 +553,23 @@ static int generate_vis_packet(struct bat_priv *bat_priv)
HASHIT(hashit_global);
struct orig_node *orig_node;
struct vis_info *info = (struct vis_info *)my_vis_info;
- struct vis_info_entry *entry, *entry_array;
+ struct vis_packet *packet = (struct vis_packet *)info->skb_packet->data;
+ struct vis_info_entry *entry;
struct hna_local_entry *hna_local_entry;
int best_tq = -1;
unsigned long flags;
info->first_seen = jiffies;
- info->packet.vis_type = atomic_read(&bat_priv->vis_mode);
+ packet->vis_type = atomic_read(&bat_priv->vis_mode);
spin_lock_irqsave(&orig_hash_lock, flags);
- memcpy(info->packet.target_orig, broadcast_addr, ETH_ALEN);
- info->packet.ttl = TTL;
- info->packet.seqno = htonl(ntohl(info->packet.seqno) + 1);
- info->packet.entries = 0;
+ memcpy(packet->target_orig, broadcast_addr, ETH_ALEN);
+ packet->ttl = TTL;
+ packet->seqno = htonl(ntohl(packet->seqno) + 1);
+ packet->entries = 0;
+ skb_trim(info->skb_packet, sizeof(struct vis_packet));
- if (info->packet.vis_type == VIS_TYPE_CLIENT_UPDATE) {
+ if (packet->vis_type == VIS_TYPE_CLIENT_UPDATE) {
best_tq = find_best_vis_server(info);
if (best_tq < 0) {
spin_unlock_irqrestore(&orig_hash_lock, flags);
@@ -538,9 +577,6 @@ static int generate_vis_packet(struct bat_priv *bat_priv)
}
}
- entry_array = (struct vis_info_entry *)
- ((char *)info + sizeof(struct vis_info));
-
while (hash_iterate(orig_hash, &hashit_global)) {
orig_node = hashit_global.bucket->data;
if (orig_node->router != NULL
@@ -551,13 +587,14 @@ static int generate_vis_packet(struct bat_priv *bat_priv)
&& orig_node->router->tq_avg > 0) {
/* fill one entry into buffer. */
- entry = &entry_array[info->packet.entries];
+ entry = (struct vis_info_entry *)
+ skb_put(info->skb_packet, sizeof(*entry));
memcpy(entry->src,
orig_node->router->if_incoming->net_dev->dev_addr,
ETH_ALEN);
memcpy(entry->dest, orig_node->orig, ETH_ALEN);
entry->quality = orig_node->router->tq_avg;
- info->packet.entries++;
+ packet->entries++;
if (vis_packet_full(info)) {
spin_unlock_irqrestore(&orig_hash_lock, flags);
@@ -571,11 +608,12 @@ static int generate_vis_packet(struct bat_priv *bat_priv)
spin_lock_irqsave(&hna_local_hash_lock, flags);
while (hash_iterate(hna_local_hash, &hashit_local)) {
hna_local_entry = hashit_local.bucket->data;
- entry = &entry_array[info->packet.entries];
+ entry = (struct vis_info_entry *)skb_put(info->skb_packet,
+ sizeof(*entry));
memset(entry->src, 0, ETH_ALEN);
memcpy(entry->dest, hna_local_entry->addr, ETH_ALEN);
entry->quality = 0; /* 0 means HNA */
- info->packet.entries++;
+ packet->entries++;
if (vis_packet_full(info)) {
spin_unlock_irqrestore(&hna_local_hash_lock, flags);
@@ -606,15 +644,18 @@ static void purge_vis_packets(void)
}
}
-static void broadcast_vis_packet(struct vis_info *info, int packet_length)
+static void broadcast_vis_packet(struct vis_info *info)
{
HASHIT(hashit);
struct orig_node *orig_node;
+ struct vis_packet *packet;
+ struct sk_buff *skb;
unsigned long flags;
struct batman_if *batman_if;
uint8_t dstaddr[ETH_ALEN];
spin_lock_irqsave(&orig_hash_lock, flags);
+ packet = (struct vis_packet *)info->skb_packet->data;
/* send to all routers in range. */
while (hash_iterate(orig_hash, &hashit)) {
@@ -630,31 +671,35 @@ static void broadcast_vis_packet(struct vis_info *info, int packet_length)
if (recv_list_is_in(&info->recv_list, orig_node->orig))
continue;
- memcpy(info->packet.target_orig, orig_node->orig, ETH_ALEN);
+ memcpy(packet->target_orig, orig_node->orig, ETH_ALEN);
batman_if = orig_node->router->if_incoming;
memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
spin_unlock_irqrestore(&orig_hash_lock, flags);
- send_raw_packet((unsigned char *)&info->packet,
- packet_length, batman_if, dstaddr);
+ skb = skb_clone(info->skb_packet, GFP_ATOMIC);
+ if (skb)
+ send_skb_packet(skb, batman_if, dstaddr);
spin_lock_irqsave(&orig_hash_lock, flags);
}
spin_unlock_irqrestore(&orig_hash_lock, flags);
- memcpy(info->packet.target_orig, broadcast_addr, ETH_ALEN);
+ memcpy(packet->target_orig, broadcast_addr, ETH_ALEN);
}
-static void unicast_vis_packet(struct vis_info *info, int packet_length)
+static void unicast_vis_packet(struct vis_info *info)
{
struct orig_node *orig_node;
+ struct sk_buff *skb;
+ struct vis_packet *packet;
unsigned long flags;
struct batman_if *batman_if;
uint8_t dstaddr[ETH_ALEN];
spin_lock_irqsave(&orig_hash_lock, flags);
- orig_node = ((struct orig_node *)
- hash_find(orig_hash, info->packet.target_orig));
+ packet = (struct vis_packet *)info->skb_packet->data;
+ orig_node = ((struct orig_node *)hash_find(orig_hash,
+ packet->target_orig));
if ((!orig_node) || (!orig_node->router))
goto out;
@@ -665,8 +710,10 @@ static void unicast_vis_packet(struct vis_info *info, int packet_length)
memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
spin_unlock_irqrestore(&orig_hash_lock, flags);
- send_raw_packet((unsigned char *)&info->packet,
- packet_length, batman_if, dstaddr);
+ skb = skb_clone(info->skb_packet, GFP_ATOMIC);
+ if (skb)
+ send_skb_packet(skb, batman_if, dstaddr);
+
return;
out:
@@ -676,24 +723,22 @@ out:
/* only send one vis packet. called from send_vis_packets() */
static void send_vis_packet(struct vis_info *info)
{
- int packet_length;
+ struct vis_packet *packet;
- if (info->packet.ttl < 2) {
+ packet = (struct vis_packet *)info->skb_packet->data;
+ if (packet->ttl < 2) {
pr_warning("Error - can't send vis packet: ttl exceeded\n");
return;
}
- memcpy(info->packet.sender_orig, main_if_addr, ETH_ALEN);
- info->packet.ttl--;
+ memcpy(packet->sender_orig, main_if_addr, ETH_ALEN);
+ packet->ttl--;
- packet_length = sizeof(struct vis_packet) +
- info->packet.entries * sizeof(struct vis_info_entry);
-
- if (is_bcast(info->packet.target_orig))
- broadcast_vis_packet(info, packet_length);
+ if (is_bcast(packet->target_orig))
+ broadcast_vis_packet(info);
else
- unicast_vis_packet(info, packet_length);
- info->packet.ttl++; /* restore TTL */
+ unicast_vis_packet(info);
+ packet->ttl++; /* restore TTL */
}
/* called from timer; send (and maybe generate) vis packet. */
@@ -733,6 +778,7 @@ static DECLARE_DELAYED_WORK(vis_timer_wq, send_vis_packets);
* initialized (e.g. bat0 is initialized, interfaces have been added) */
int vis_init(void)
{
+ struct vis_packet *packet;
unsigned long flags;
if (vis_hash)
return 1;
@@ -745,27 +791,36 @@ int vis_init(void)
goto err;
}
- my_vis_info = kmalloc(1000, GFP_ATOMIC);
+ my_vis_info = kmalloc(MAX_VIS_PACKET_SIZE, GFP_ATOMIC);
if (!my_vis_info) {
pr_err("Can't initialize vis packet\n");
goto err;
}
+ my_vis_info->skb_packet = dev_alloc_skb(sizeof(struct vis_packet) +
+ MAX_VIS_PACKET_SIZE +
+ sizeof(struct ethhdr));
+ if (!my_vis_info->skb_packet)
+ goto free_info;
+ skb_reserve(my_vis_info->skb_packet, sizeof(struct ethhdr));
+ packet = (struct vis_packet *)skb_put(my_vis_info->skb_packet,
+ sizeof(struct vis_packet));
+
/* prefill the vis info */
my_vis_info->first_seen = jiffies - msecs_to_jiffies(VIS_INTERVAL);
INIT_LIST_HEAD(&my_vis_info->recv_list);
INIT_LIST_HEAD(&my_vis_info->send_list);
kref_init(&my_vis_info->refcount);
- my_vis_info->packet.version = COMPAT_VERSION;
- my_vis_info->packet.packet_type = BAT_VIS;
- my_vis_info->packet.ttl = TTL;
- my_vis_info->packet.seqno = 0;
- my_vis_info->packet.entries = 0;
+ packet->version = COMPAT_VERSION;
+ packet->packet_type = BAT_VIS;
+ packet->ttl = TTL;
+ packet->seqno = 0;
+ packet->entries = 0;
INIT_LIST_HEAD(&send_list);
- memcpy(my_vis_info->packet.vis_orig, main_if_addr, ETH_ALEN);
- memcpy(my_vis_info->packet.sender_orig, main_if_addr, ETH_ALEN);
+ memcpy(packet->vis_orig, main_if_addr, ETH_ALEN);
+ memcpy(packet->sender_orig, main_if_addr, ETH_ALEN);
if (hash_add(vis_hash, my_vis_info) < 0) {
pr_err("Can't add own vis packet into hash\n");
@@ -778,6 +833,9 @@ int vis_init(void)
start_vis_timer();
return 1;
+free_info:
+ kfree(my_vis_info);
+ my_vis_info = NULL;
err:
spin_unlock_irqrestore(&vis_hash_lock, flags);
vis_quit();
@@ -32,7 +32,7 @@ struct vis_info {
struct list_head send_list;
struct kref refcount;
/* this packet might be part of the vis send queue. */
- struct vis_packet packet;
+ struct sk_buff *skb_packet;
/* vis_info may follow here*/
} __attribute__((packed));